Dental engine



Q (No Model.)

D. H. GILMER.

DENTAL ENGINE.

N0. Z78,933. Patented June 5,1883.

J'iyl.

UNITED STATES PATENT OFFIC DAN H. GILMER, or FINDLAY, OHIO,

DENTALIENGINE.

SPECIFICATION forming part of Letters Patent No. 278,933, dated June 5, 1883.

Application filed March 17,1883. (No model.)

T0 on whom, it may concern:

Be it known that I, D. H. GILMER, a citizen of the United States, and a resident of- Findlay,

in the county of Hancock and State of Ohio, have invented certain new and useful Improvements in Dental Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a front view of my device, and Fig. 2 is a vertical sectional view of the same.

Thisinvention has relation to dental engines; and it consists in the construction and novel arrangement of parts, as will be hereinafter more fully described, and particularly,pointed out in the claims appended.

My object in the construction hereinafter described is mainly to dispense with the troublesome arm heretofore in use, and to provide a dental engine that may be suspended from the ceiling of the room directly in front of the dentist s chair and its, occupant in such a position that the hand-piece and the implement it carries may be manipulated in a ready manner to perform any required operation wit-h the implement. The power employed to drive the engine may be either hand or foot power, the latter being applied by either the dentist himself or by an assistant, and the former byan assistant; or steam or electric force may be used, if desired. I Y

Referring by letter to the accompanying drawings, a designates the hanger board, which is secured to the ceiling of the room at the desired point, and b b the hangers which support the stationary rod 0 and the shaft f. d d are U-shaped hangers, supported near the upper ends of their arms by the rod 0, and carrying near their lower, just above their curves, the friction-rollers e, as shown.

g designates the pulley that receives the drive-belt, which is keyed to the shaft fbetween the arms of the hanger (1. his the pulley that through its belt transmits motion to the shaft of the hand piece hereinafter described. 7

To the lower portion of the hanger d is secured abearing, (1 in which the upper end of a fiat extension-bar, j, is pivoted, as shown, so that it will oscillate in the direction of the length of the shaft f. The lower section, of

the extension-bar is swiveled to a boX or bearing-piece, o, and to this box 0 the hanger k for the hand-piece is pivoted. One of the sections j or j is slotted, and through this slot p a set-screw, p, is passed into the other section, so that the engine may be put up in rooms having ceilings of different height by shortening or lengthening the extension-bar according to requirement The hanger k of the hand-piece is nearly i 0 form, and carries friction-rollers e e, simi lar to the frictionrollers e e in the hangers d d.

l designates the shaft for the hand-piece; Z,-

the pulley for receiving the belt from the pulley h, and on a balance-weight adjustable on the shaft 7. r7 1" are friction-collars on the shafts Z and'j'.

The swivel 'and'oscillating connections between the hanger d, the extension-bar j j, and the hand-piece hanger k render the hand piece capable of manipulation in any required position, and the hand-piece being suspended directly in front of the patient, and there being no troublesome arm in .the way of the dentist, the advantages of this construction will be at once apparent to any one skilled in the profession for which. the engine is intended.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, isl.

1. In a dental engine, the combinatioinwith the hanger (1 of the oscillating extension-bar j j and the swiveled and oscillating hanger k, carrying the shaft 1, and'mechanism for driv--' ing said shaft, substantially as specified.

In a dental engine, the swiveled and oscillating hanger k,.carrying the rotary hand shaft Z,provided with the pulley Z, the friction-collars i i, and the friction-rollers e e, secured to said hanger J: above the pulley I, substantially as specified.

3. The combination of the hanger-board (a 

